CN203384013U - Roots pump unit with air ejector - Google Patents
Roots pump unit with air ejector Download PDFInfo
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- CN203384013U CN203384013U CN201320358492.2U CN201320358492U CN203384013U CN 203384013 U CN203384013 U CN 203384013U CN 201320358492 U CN201320358492 U CN 201320358492U CN 203384013 U CN203384013 U CN 203384013U
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- vacuum pump
- pump
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Abstract
The utility model provides a roots pump unit with an air ejector and belongs to the technical field of vacuum pump devices. The roots pump unit comprises a roots pump (1) and a vacuum pump (2) and is characterized in that the roots pump (1) is in series connection with the vacuum pump (2) through a connecting pipe, the air ejector (3) is arranged at the front end of an air inlet of the vacuum pump (2), the air inlet end of the air ejector (3) is connected with an air-liquid separator (6), the air exhaust end of the air ejector (3) is connected with a main air sucking port (10) of the unit, and the air discharge end of the air ejector (3) is connected with the air inlet of the vacuum pump (2). The roots pump unit can suck general air and suck air containing moisture or a small amount of dust. Compared with general vacuum pumps, the roots pump unit can resist oil pollution, water steam and mote and has the advantages of being high in vacuum degree and high in sucking speed under the working condition of high vacuum degree.
Description
Technical field
The invention belongs to the vaccum pump unit technical field, be specifically related to a kind of unit of the Roots pump with vacuum pump.
Background technique
Roots pump is a kind of vacuum displacement pump.It is to utilize a pair of 8 font rotors to keep certain gap in pump case, do the constant speed counterrotating and produce air-breathing and scavenging action, two rotors are supported in the rolling bearing of two side faces end cap of pump case, rely on a pair of adjustable synchromesh gear to make two rotors remain certain mutual alignment when high-speed reverse is rotated, and the end clearance between rotor and end cap is to guarantee by the adjustable metal sheet below the fixed end bearing support, pump can only be risen to an end is swollen when work because of the rotor that is heated.
Vacuum pump is a kind of Jet injector, its working principle is, under the effect of water ring vaccum pump, being taken out container forms certain forevacuum, when approaching the limiting vacuum of this water ring vaccum pump, connect vacuum pump, now, ambient atmosphere (or pressed gas is arranged) sharply is drawn into intake line, and through the nozzle of vacuum pump, airspeed further increases, therefore pressure reduces rapidly, so that form high vacuum in nozzle (the obvious limiting vacuum higher than water ring vaccum pump), like this, continuation will be sucked in water ring vaccum pump by the gas of the system of taking out.
Water ring vaccum pump is also a kind of vacuum displacement pump.Impeller is arranged in the pump housing prejudicially, during starting to injecting the water of certain altitude in pump, therefore when vane rotary, water is subject to the effect of centrifugal force and forms a rotation water ring at pump housing inwall, water ring upper inside surface and wheel hub are tangent to be rotated along the direction of arrow, in first half, turn in journey, the water ring internal surface breaks away from wheel hub gradually, therefore between impeller blade, with water ring, forms enclosed space.Along with the rotation of impeller, this space enlarges gradually, and the space gas pressure reduces, and gas is inhaled into space; Turn over journey later half, the water ring internal surface is gradually close with wheel hub, and interlobate space dwindles gradually, and the space gas pressure raises, and during higher than exhaust port pressure, interlobate gas is discharged from.So the every rotation of impeller is one week, and once, many spaces work without cessation the suction and discharge of interlobate space, and pump just constantly aspirates or force feed gas continuously.
In the past, when the total intakeport degree of vacuum of customer requirements unit is 6 ~ 8hPa.A, must just can reach requirement with 2 Roots pumps and 1 water ring vaccum pump, and this unit is when summer, because the tolerance of water ring vaccum pump is subject to the impact of water temperature larger when high vacuum, unit operation is not very stable.
Summary of the invention
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, a kind of unit of the Roots pump with vacuum pump that replaces the one-level Roots pump with vacuum pump is provided, because vacuum pump is not subject to the impact of water temperature, this unit reliable operation, cost is low.
The utility model solves the technological scheme that its technical problem adopts: this unit of Roots pump with vacuum pump, comprise Roots pump and vacuum pump, it is characterized in that: described Roots pump is connected with vacuum pump by junction line, and the junction line of described Roots pump and vacuum pump is provided with the first jettron; The suction port front end of described vacuum pump is provided with vacuum pump; Described vacuum pump inlet end is connected with gas-liquid separator, and vacuum pump is bled to hold and is connected with total intakeport of unit, and the vacuum pump exhaust end is connected with the suction port of vacuum pump; The junction line of vacuum pump inlet end and gas-liquid separator is provided with the second jettron.
Described the first jettron is connected with the DCS control system respectively with the second jettron.
Described twin-stage liquid-ring vacuum pump exhaust end connects with gas-liquid separator, and gas-liquid separator top is provided with relief opening, and bottom connects with twin-stage liquid-ring vacuum pump water supplement port by return piping.
Described gas-liquid separator bottom return piping is provided with the heat exchanger for the backwater cooling.
Described gas-liquid separator bottom return piping is provided with the y-type filter filtered for backwater.
Described Roots pump suction end pipeline is provided with pressure transmitter, and pressure transmitter is connected with the DCS control system.
Described vacuum pump adopts the twin-stage liquid-ring vacuum pump.
Compared with prior art, the beneficial effect that the Roots pump unit of the utility model band vacuum pump has is: by Roots pump, as the main pump of taking out, twin-stage water ring pump band vacuum pump is as the unit of bleeding of fore pump composition.Except being used for extracting general gas flow, can also aspirating the gas that contains moisture or a small amount of dust.Compare with the common mechanical vacuum pump, be not afraid of oil pollution, be not afraid of aqueous vapor and micronic dust, and compare with general Nash hytor, have degree of vacuum high and under the condition of high vacuum degree operating mode the large characteristics of pumping speed.
The accompanying drawing explanation
Fig. 1 is the Roots pump set structure principle flow chart of the utility model band vacuum pump.
Wherein: 1, Roots pump 2, vacuum pump 3, vacuum pump 4, the first jettron 5, the second jettron 6, gas-liquid separator 7, heat exchanger 8, pressure transmitter 9, y-type filter 10, total intakeport 11, relief opening 12, cooling water intake 13, coolant outlet 14, total evacuation port.
Fig. 1 is the most preferred embodiment of the Roots pump unit of the utility model band vacuum pump, below in conjunction with 1 pair of the utility model of accompanying drawing, is described further.
Embodiment
With reference to accompanying drawing 1: this unit of Roots pump with vacuum pump comprises Roots pump 1, vacuum pump 2 and vacuum pump 3, the total intakeport 10 of Roots pump 1 connects with higher level equipment, Roots pump 1 suction end pipeline is provided with pressure transmitter 8, and pressure transmitter 8 is connected with the DCS control system.Roots pump 1 is connected with vacuum pump 2 by junction line, Roots pump 1 is provided with the first jettron 4 with the junction line of vacuum pump 2, vacuum pump 2 exhaust ends connect with gas-liquid separator 6, and gas-liquid separator 6 tops are provided with relief opening 11, and bottom connects with vacuum pump 2 water supplement ports by return piping.Gas-liquid separator 6 bottom return pipings are provided with for the heat exchanger 7 of backwater cooling and the y-type filter 9 filtered for backwater.
Suction port front end at vacuum pump 2 is provided with vacuum pump 3, and vacuum pump 3 inlet ends are connected with gas-liquid separator 6, and vacuum pump 3 is bled to hold and is connected with total intakeport 10 of unit, and vacuum pump 3 exhaust ends are connected with the suction port of vacuum pump 2; The junction line of vacuum pump 3 inlet ends and gas-liquid separator 6 is provided with the second jettron 5.
The first jettron 4 is connected with the DCS control system respectively with the second jettron 5.
In this unit, preferably adopt the twin-stage liquid-ring vacuum pump.
The unit operation working procedure is as follows: 1, according to the requirement of operating instruction, carry out the preparatory work before vacuum pump 2 starts, start vacuum pump 2.
2, when the degree of vacuum of the pressure transmitter of vacuum pump 2 entrances during higher than-0.088MPa, start the pneumatic valve before vacuum pump 3, vacuum pump 3 is started working.
3, during higher than-0.096MPa, start Roots pump 1 when the degree of vacuum of the pressure transmitter of vacuum pump 2 entrances, Roots pump 1 is started working.
4, vacuum pump 2 is in service, and the low vacuum of the pressure transmitter of vacuum pump 2 entrances, when-0.096MPa, is closed Roots pump 1.During higher than-0.096MPa, restart Roots pump 1 until degree of vacuum.
While 4, shutting down, Roots pump 1 first quits work, and then vacuum pump 2 quits work.
The above, it is only preferred embodiment of the present utility model, be not the utility model to be done to the restriction of other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solutions of the utility model content that do not break away from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present utility model, still belong to the protection domain of technical solutions of the utility model.
Claims (7)
1. with the Roots pump unit of vacuum pump, comprise Roots pump (1) and vacuum pump (2), it is characterized in that: described Roots pump (1) is connected with vacuum pump (2) by junction line, and described Roots pump (1) is provided with the first jettron (4) with the junction line of vacuum pump (2); The suction port front end of described vacuum pump (2) is provided with vacuum pump (3), described vacuum pump (3) inlet end is connected with gas-liquid separator (6), vacuum pump (3) is bled to hold and is connected with total intakeport (10) of unit, and vacuum pump (3) exhaust end is connected with the suction port of vacuum pump (2); The junction line of vacuum pump (3) inlet end and gas-liquid separator (6) is provided with the second jettron (5).
2. the unit of the Roots pump with vacuum pump according to claim 1, it is characterized in that: described the first jettron (4) is connected with the DCS control system respectively with the second jettron (5).
3. the unit of the Roots pump with vacuum pump according to claim 1, it is characterized in that: described vacuum pump (2) exhaust end connects with gas-liquid separator (6), gas-liquid separator (6) top is provided with relief opening (11), and bottom connects with vacuum pump (2) water supplement port by return piping.
4. the unit of the Roots pump with vacuum pump according to claim 3 is characterized in that: described gas-liquid separator (6) bottom return piping is provided with the heat exchanger (7) for the backwater cooling.
5. according to the described unit of the Roots pump with vacuum pump of claim 3 or 4, it is characterized in that: described gas-liquid separator (6) bottom return piping is provided with the y-type filter (9) filtered for backwater.
6. the unit of the Roots pump with vacuum pump according to claim 1, it is characterized in that: described Roots pump (1) suction end pipeline is provided with pressure transmitter (8), and pressure transmitter (8) is connected with the DCS control system.
7. the unit of the Roots pump with vacuum pump according to claim 1, is characterized in that: described vacuum pump (2) employing twin-stage liquid-ring vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320358492.2U CN203384013U (en) | 2013-06-21 | 2013-06-21 | Roots pump unit with air ejector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320358492.2U CN203384013U (en) | 2013-06-21 | 2013-06-21 | Roots pump unit with air ejector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203384013U true CN203384013U (en) | 2014-01-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320358492.2U Expired - Lifetime CN203384013U (en) | 2013-06-21 | 2013-06-21 | Roots pump unit with air ejector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203384013U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806881A (en) * | 2015-04-03 | 2015-07-29 | 广东省佛山水泵厂有限公司 | Gas-cooled loop-closed Roots liquid vacuum system and control method thereof |
| CN105018680A (en) * | 2015-01-12 | 2015-11-04 | 张宝夫 | RH refining device |
| CN105202936A (en) * | 2015-10-10 | 2015-12-30 | 中联西北工程设计研究院有限公司 | Low-energy-consumption condenser variable frequency vacuum system |
| CN105626480A (en) * | 2015-12-24 | 2016-06-01 | 浙江杭真能源科技股份有限公司 | Vacuum system for grease device |
| CN107559200A (en) * | 2017-11-01 | 2018-01-09 | 广东肯富来泵业股份有限公司 | Balanced type Roots vacuum pumping system and its control method |
| WO2020078471A1 (en) * | 2018-10-18 | 2020-04-23 | Changxin Memory Technologies, Inc. | A degassing system, a degassing tower, and a water system having the same |
-
2013
- 2013-06-21 CN CN201320358492.2U patent/CN203384013U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018680A (en) * | 2015-01-12 | 2015-11-04 | 张宝夫 | RH refining device |
| CN105018680B (en) * | 2015-01-12 | 2017-04-12 | 张宝夫 | RH refining device |
| CN104806881A (en) * | 2015-04-03 | 2015-07-29 | 广东省佛山水泵厂有限公司 | Gas-cooled loop-closed Roots liquid vacuum system and control method thereof |
| CN104806881B (en) * | 2015-04-03 | 2017-06-16 | 广东肯富来泵业股份有限公司 | A kind of air cooling Roots pendular ring closed vacuum system and its control method |
| CN105202936A (en) * | 2015-10-10 | 2015-12-30 | 中联西北工程设计研究院有限公司 | Low-energy-consumption condenser variable frequency vacuum system |
| CN105202936B (en) * | 2015-10-10 | 2017-12-29 | 中联西北工程设计研究院有限公司 | A kind of low energy consumption condenser frequency conversion vacuum system |
| CN105626480A (en) * | 2015-12-24 | 2016-06-01 | 浙江杭真能源科技股份有限公司 | Vacuum system for grease device |
| CN107559200A (en) * | 2017-11-01 | 2018-01-09 | 广东肯富来泵业股份有限公司 | Balanced type Roots vacuum pumping system and its control method |
| WO2020078471A1 (en) * | 2018-10-18 | 2020-04-23 | Changxin Memory Technologies, Inc. | A degassing system, a degassing tower, and a water system having the same |
| US11891310B2 (en) | 2018-10-18 | 2024-02-06 | Changxin Memory Technologies, Inc. | Degassing system, a degassing tower, and a water system having the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140108 |
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| CX01 | Expiry of patent term |